diff --git a/pkgs/tools/security/theharvester/default.nix b/pkgs/tools/security/theharvester/default.nix
index 9c806dfb633d..812b30f0df9a 100644
--- a/pkgs/tools/security/theharvester/default.nix
+++ b/pkgs/tools/security/theharvester/default.nix
@@ -75,5 +75,6 @@ python3.pkgs.buildPythonApplication rec {
     changelog = "https://github.com/laramies/theHarvester/releases/tag/${version}";
     license = licenses.gpl2Only;
     maintainers = with maintainers; [ c0bw3b fab treemo ];
+    mainProgram = "theHarvester";
   };
 }